Environnement AS32M, Technical Manual, Page: 84 / 186

Environnement
S.A
AS32M
Duplication prohibited
DECEMBER 2013
3–46
3.3.6.2 TESTS

Multiplexer (MUX) signals
This screen is used to check the multiplexer signals.
NOTE :
The "XXXX mV" displayed value will be checked according to the acceptable limits listed in
Table 3-3.
Table 3-3 – Multiplexer (MUX) signals (acceptable limits on channel 1 to 16)
Channel Display Parameters Lower limit
Normal
value
Upper limit
1 GND Analog ground 0 mV 5 mV 50 mV
2 Int. T° Internal temperature of analyzer 100 mV 400 mV 600 mV
3 Opt. T° Temperature of optical chamber – 450 mV –
4 Gas T° Temperature of sample gas – 430 mV –
5 Loss Optical losses of cavity 100 mV 400 mV 600 mV
6 Perm. B. Permeation bench – 2235 mV –
7 I.Led Light intensity emitted by LED 300 mV 400 mV 600 mV
8 Raw_NO2
Non-filtered measurement of NO
2
concentration
- 2 mV 0 mV + 2 mV
9 Aux1 Pr. Auxiliary pressure 1 Not used Not used Not used
10 Aux2 Pr. Auxilary pressure 2 Not used Not used Not used
11 Sample P Pressure inside optical cavity 1700 mV* 1800 mV* 1900 mV*
12 Signal Light intensity received by phototube 500 mV 4000 mV 4500 mV
13 Phase
Phase difference of received signal
compared to LED signal
35 mV 40 mV 45 mV
14 Aux1. T° Auxiliary temperature 1 Not used Not used Not used
15 H.R. Relative humidity sensor Not used Not used Not used
16 2.5 V ref
Reference voltage of analog/digital
converter
2450 mV 2500 mV 2550 mV
(*) These values are given as information and they depend on the A and B linearization coefficients (
«
SPAN

Pressure »
screen).